If the disk is the standard 2.5” PATA IDE form factor, and doesn’t involve any adapters, you can put in two disks.

128 will work with the factory kernel. 256 will work with the hijack kernel.

http://www.riocar.org/Drive_Upgrade.html (It’s baaaaaack)

Note: I had to run the builder twice on my Kingspec drive.

Happy upgrading!